diff --git a/gdk/quartz/gdkgc-quartz.c b/gdk/quartz/gdkgc-quartz.c
index d54ad52493..1e64972517 100644
--- a/gdk/quartz/gdkgc-quartz.c
+++ b/gdk/quartz/gdkgc-quartz.c
@@ -551,7 +551,7 @@ _gdk_quartz_gc_update_cg_context (GdkGC                      *gc,
       CGContextSetStrokeColorWithColor (context, color);
       CGColorRelease (color);
 
-      CGContextSetLineWidth (context, MAX (G_MINFLOAT, private->line_width));
+      CGContextSetLineWidth (context, MAX (1.0, private->line_width));
 
       switch (private->line_style)
 	{